Related Experiment Video
Updated: May 31, 2026

15:19
Effect of Male Accessory Gland Products on Egg Laying in Gastropod Molluscs
Published on: June 22, 2014
Seminal plasma proteins: what role do they play?
Heriberto Rodríguez-Martínez1, Ulrik Kvist, Jan Ernerudh
1Department of Clinical & Experimental Medicine (IKE), Faculty of Health Sciences, Linköping University, Linköping, Sweden. heriberto.rodriguez-martinez@liu.se
Summary
Seminal plasma proteins are crucial for sperm function and fertility. This review explores their roles in reproductive biology, diagnostics, and treatment.
Area of Science:
- Reproductive Biology
- Proteomics
- Immunology
Background:
- Semen is a complex fluid containing proteins with incompletely understood functions.
- Seminal plasma (SP) composition varies, influencing sperm-female tract interactions.
Purpose of the Study:
- To review the current knowledge of seminal plasma proteomics.
- To discuss the relevance of SP proteins in reproductive biology, diagnostics, and treatment.
Main Methods:
- Comparative review of existing literature on seminal plasma proteomics.
- Analysis of in vivo and in vitro sperm exposure to seminal secretions.
Main Results:
- Proteins in seminal plasma are vital for sperm function and interaction with the female reproductive tract.
- Specific proteins modulate the female immune response, influencing sperm tolerance and fertility.
- Spermatozoa encounter varying concentrations of seminal plasma constituents.
Conclusions:
- Seminal plasma proteins have diverse functions, impacting fertility.
- Understanding SP proteins is key for reproductive diagnostics and therapies.
Related Concept Videos
Sperm Structure and Semen Composition
During ejaculation, males release around 2-5 milliliters of semen, which is a complex mixture of mature sperm and various fluids produced by accessory glands. The mature sperm cells measure approximately 60 micrometers in length and consist of a head, neck, midpiece, and tail. The head is flattened and tapered, measuring about 4 to 5 micrometers in length. It contains a nucleus with condensed chromosomes and an acrosome, a cap-like structure filled with enzymes essential for penetrating the...
Sperm Transport
The journey of sperm from its origin to the point of ejaculation begins within the seminiferous tubules of the testis. Here, Sertoli cells produce fluid that propels non-motile sperm through a series of conduits, starting with the straight tubules leading to the rete testis. This interconnected network of tubules acts as the initial pathway for sperm, guiding them into the efferent ductules and then into the epididymis for maturation.
The maturation phase occurs in the epididymis, where sperm...
The maturation phase occurs in the epididymis, where sperm...
Composition of Blood Plasma
Blood plasma is a fluid that contains approximately 92% water and 8% solutes. The solutes include various types of proteins, which constitute about 7% of the total solutes in the plasma. The high-molecular-weight proteins—albumins, globulins, and fibrinogen—are essential to plasma function. Albumins, making up about 60% of the plasma proteins, maintain the osmotic balance within blood vessels by preventing excessive water leakage. Additionally, albumins serve as carrier proteins, binding to...
Spermatogenesis
Spermatogenesis is the process by which haploid sperm cells are produced in the male testes. It starts with stem cells located close to the outer rim of seminiferous tubules. These spermatogonial stem cells divide asymmetrically to give rise to additional stem cells (meaning that these structures “self-renew”), as well as sperm progenitors, called spermatocytes. Importantly, this method of asymmetric mitotic division maintains a population of spermatogonial stem cells in the male reproductive...
Spermatogenesis
Spermatogenesis is a complex process that involves the development of sperm cells from undifferentiated stem cells in the seminiferous tubules of the testes. The process is essential for the production of mature and functional sperm cells that are capable of fertilizing an egg.
The process of spermatogenesis can be divided into mitosis, meiosis, and spermiogenesis. During mitosis, the spermatogonia or stem cells divide to produce two identical daughter cells, type A and B spermatogonia. Type-A...
The process of spermatogenesis can be divided into mitosis, meiosis, and spermiogenesis. During mitosis, the spermatogonia or stem cells divide to produce two identical daughter cells, type A and B spermatogonia. Type-A...
Overview of Exosomes
Exosomes are stable, lipid bilayer-enclosed vesicles capable of crossing biological barriers. They can carry a wide range of molecules required for intercellular communication. Once exosomes are released from the cell where they originated, they enter a recipient cell through various pathways such as fusion, receptor-mediated endocytosis, macropinocytosis, and phagocytosis.
Stahl et al. discovered exosomes in 1983, but the exosomes were initially considered waste products released from the...
Stahl et al. discovered exosomes in 1983, but the exosomes were initially considered waste products released from the...

